Fly Deluxe Vibrato

Action is set with two screws from the back of the guitar.
Using the L-shaped 5/32 Allen wrench supplied with your guitar,
turn the screws clockwise to raise the bridge and counterclockwise to lower it. If
you're changing the action a lot, it's good practice to alternate between two screws,
making no more than a ¼ turn at a time.

If you're unfamiliar with adjusting action, we strongly suggest
that you take your instrument to your favorite guitar technician.